BUS_FOR_EACH_DEV(9) Device drivers infrastructure BUS_FOR_EACH_DEV(9)
NAME bus_for_each_dev - device iterator.
SYNOPSIS int bus_for_each_dev(struct bus_type * bus, struct device * start, void * data, int (*fn) (struct device *, void *));
ARGUMENTS bus bus type.
start device to start iterating from.
data data for the callback.
fn function to be called for each device.
DESCRIPTION Iterate over bus´s list of devices, and call fn for each, passing it data. If start is not NULL, we use that device to begin iterating from.
We check the return of fn each time. If it returns anything other than 0, we break out and return that value.
NOTE The device that returns a non-zero value is not retained in any way, nor is its refcount incremented. If the caller needs to retain this data, it should do so, and increment the reference count in the supplied callback.
COPYRIGHT Kernel Hackers Manual 2.6. September 2014 BUS_FOR_EACH_DEV(9)